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"Lunana: A Yak in the Classroom" appears to be a title of a film or possibly an educational document. The mention of "20" in your query might relate to the year 2020, suggesting the document or film could have been released or published around that time.

This film is a must-watch for several reasons:

No. And it shouldn’t. Part of the charm is the natural Dzongkha dialogue. Use subtitles.